Remove declarations of unused variables

All these produced a diagnostic when -Wunused-variables was specified.

encoder_module.c

@@ -92,7 +92,7 @@ int encoder_cleanup(encoder_module_t *enc) {
 int encoder_read(encoder_module_t *enc) {
     board_t *board;
     u32 tsc, count, control;
-    u16 reg_count, reg_time_stamp, ctrl;
+    u16 reg_count, reg_time_stamp;
     int prev_raw_counts = enc->raw_counts, reg_count_diff, tsc_rollover = 0;
     int dT_clocks;
     double dT_seconds;

epp_boards.c

@@ -38,7 +38,6 @@
 
 extern board_t boards[MAX_BOARDS];
 extern int boards_count;
-static u8 page_buffer[PAGE_SIZE];
 extern u8 boot_block[BOOT_BLOCK_SIZE];
 static u8 file_buffer[SECTOR_SIZE];
 
@@ -339,7 +338,6 @@ static int epp_board_close(board_t *board) {
 void epp_boards_scan(board_access_t *access) {
 #ifdef __linux__
     board_t *board = &boards[boards_count];
-    int r;
     u16 epp_addr = 0, epp_hi_addr = 0;
     u32 hm2_cookie, eppio_cookie;
 

lbp.c

@@ -85,7 +85,7 @@ int lbp_read(u16 addr, void *buffer) {
 }
 
 int lbp_write(u16 addr, void *buffer) {
-    int send, recv;
+    int send;
     lbp_cmd_addr_data packet;
 
     packet.cmd = LBP_CMD_WRITE | LBP_ARGS_32BIT;

mesaflash.c

@@ -179,8 +179,6 @@ int process_cmd_line(int argc, char *argv[]) {
             break;
 
             case 'a': {
-                int i;
-
                 if (addr_flag > 0) {
                     printf("Error: multiple --addr options\n");
                     exit(-1);

serial_boards.c

@@ -40,7 +40,7 @@ int sd;
 // serial access functions
 
 int serial_send_packet(void *packet, int size) {
-    int send, rc, ret;
+    int rc, ret;
     int r = 0, timeouts = 0;
     struct timespec timeout = {0, 50*1000*1000};
     struct pollfd fds[1];
@@ -66,7 +66,7 @@ int serial_send_packet(void *packet, int size) {
 }
 
 int serial_recv_packet(void *packet, int size) {
-    int recv, rc, ret;
+    int rc, ret;
     int r = 0, timeouts = 0;
     struct timespec timeout = {0, 300*1000*1000};
     struct pollfd fds[1];
@@ -165,7 +165,7 @@ void serial_boards_cleanup(board_access_t *access) {
 
 void serial_boards_scan(board_access_t *access) {
     lbp16_cmd_addr packet;
-    int send = 0, recv = 0, ret = 0;
+    int send = 0, recv = 0;
     char buff[16];
 
     LBP16_INIT_PACKET4(packet, CMD_READ_BOARD_INFO_ADDR16_INCR(8), 0);
@@ -207,12 +207,9 @@ void serial_boards_scan(board_access_t *access) {
 void serial_print_info(board_t *board) {
     lbp16_cmd_addr packet;
     int i, j, recv;
-    u32 flash_id;
     char *mem_types[16] = {NULL, "registers", "memory", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "EEPROM", "flash"};
     char *mem_writeable[2] = {"RO", "RW"};
     char *acc_types[4] = {"8-bit", "16-bit", "32-bit", "64-bit"};
-    char *led_debug_types[2] = {"Hostmot2", "eth debug"};
-    char *boot_jumpers_types[4] = {"fixed "LBP16_HW_IP, "fixed from EEPROM", "from BOOTP", "INVALID"};
     lbp_mem_info_area mem_area;
     lbp_timers_area timers_area;
     lbp_status_area stat_area;

sserial_module.c

@@ -56,7 +56,7 @@ static void enable_sserial_pins(llio_t *llio) {
 
 // Return the physical ports to default
 static void disable_sserial_pins(llio_t *llio) {
-    int port_pin, port;
+    int port;
     u32 ddr_reg = 0;
     u32 src_reg = 0;
     hm2_module_desc_t *md = hm2_find_module(&(llio->hm2), HM2_GTAG_IOPORT);
@@ -95,7 +95,6 @@ void sslbp_send_remote_cmd(sserial_module_t *ssmod, int interface, int channel,
 }
 
 u8 sslbp_read_local8(sserial_module_t *ssmod, int interface, u32 addr) {
-    u8 ret;
 
     sslbp_send_local_cmd(ssmod, interface, SSLBP_CMD_READ(addr));
     sslbp_wait_complete(ssmod, interface);
@@ -222,9 +221,7 @@ void sslbp_read_remote_bytes(sserial_module_t *ssmod, int interface, int channel
 }
 
 int sserial_init(sserial_module_t *ssmod, board_t *board, int interface_num, int channel_num, u32 remote_type) {
-    u32 cmd, status, data, addr;
-    u16 d;
-    int i;
+    u32 cmd, status;
     hm2_module_desc_t *md = hm2_find_module(&(board->llio.hm2), HM2_GTAG_SSERIAL);
 
     if (md == NULL) {
@@ -338,7 +335,6 @@ void sserial_module_init(llio_t *llio) {
     hm2_module_desc_t *md = hm2_find_module(&(llio->hm2), HM2_GTAG_SSERIAL);
     sserial_module_t ssmodule, *ssmod = &ssmodule;
     char *record_types[9] = {"PADDING", "BITFIELD", "UNSIGNED", "SIGNED", "NV UNSIGNED", "NV SIGNED", "STREAM", "BOOLEAN", "ENCODER"};
-    char *mode_types[2] = {"HARDWARE", "SOFTWARE"};
     char *baud_rates[12] = {"9600b", "19200b", "38400b", "57600b", "115200b", "230400b", "460800b", "921600b", "1.25Mb", "2.5Mb", "5Mb", "10Mb"};
 
     if (md == NULL)
@@ -419,7 +415,7 @@ void sserial_module_init(llio_t *llio) {
                 sserial_pdd_t sserial_pdd;
                 sserial_md_t sserial_md;
                 u8 record_type;
-                char name[48], unit[48], buff[32];
+                char name[48], unit[48];
 
                 d = sslbp_read_remote16(ssmod, port, channel, addr);
                 if (d == 0) break;

usb_boards.c

@@ -56,7 +56,6 @@ int usb_write(llio_t *self, u32 addr, void *buffer, int size) {
 static int usb_program_fpga(llio_t *self, char *bitfile_name) {
     board_t *board = self->board;
     int bindex, bytesread;
-    u32 status, control;
     char part_name[32];
     struct stat file_stat;
     FILE *fp;
@@ -124,7 +123,6 @@ void usb_boards_scan(board_access_t *access) {
     board_t *board = &boards[boards_count];
     u8 cmd, data;
     char dev_name[4];
-    u32 cookie;
 
     board_init_struct(board);